I have a 4 y/o girl who is into some action figures... all her little boy friends are between 4 and 8 y/o and so my experience comes from them and for working at Toys R Us. The action figures kids are into these days are (in order of sales) Star Wars, Transformers, GI Joe , & Ben 10. I don't know about Saturday morning cartoons, but I know "Clone Wars" is a huge thing with kids.

As far as my comments reguarding Hasbro gearing GI Joe towards kids... My friends Grandpa is the former Vice President of Hasbro, so I think I like to believe in my sources.

Indiana Jones figures didn't go over so well for multiple reasons, one major one being alot of parents wouldn't let their kids see the movie when it first hit theaters, but instead made the kids wait a week or until it hit dollor theaters. The figures suffered for that, among many other reasons... marketing is one. The GI Joe movie figures are probably gonna suffer the same if not simular fate... the collectors won't want them, the kids will want them, but parents will so no.